Angle that is smaller than a right angle (less than 90Â°). Angle formed by two lines or two perpendicular planes that measures 90Â°. Symbol denoting that a straight line meets another at a right angle. Symbol denoting that two straight lines do not remain at a constant distance from one other. Symbol denoting that two straight lines remain at a constant distance from one another.
Constriction vs. Dilation. Constriction and dilation are opposite, but related, processes in the body. Whereas dilation is an opening or widening of a structure or passageway to increase material flow, constriction leads to a decrease in material flow by closing the passage.
â¢ OPPOSITE (noun). The noun OPPOSITE has 4 senses: 1. a word that expresses a meaning opposed to the meaning of another word, in which case the two words are antonyms of each other. 2. a relation of direct opposition.3. a contestant that you are matched against. 4. something inverted in sequence or character or effect.he noun OPPOSITE has 4 senses: 1. a word that expresses a meaning opposed to the meaning of another word, in which case the two words are antonyms of each other. 2. a relation of direct opposition. 3. a contestant that you are matched against. 4. something inverted in sequence or character or effect.